Home / 90,783.36-136,178.67-31,625.01

Finding the Fourth Proportional to 90,783.36, 136,178.67 and 31,625.01

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Solution

The fourth proportional to 90,783.36, 136,178.67 and 31,625.01 is: 47,438.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.36 : 136,178.67 = 31,625.01 : x
  2. Step 2: Convert to fraction form
    90,783.36/136,178.67 = 31,625.01/x
  3. Step 3: Cross multiply
    90,783.36x = 136,178.67 × 31,625.01
  4. Step 4: Simplify right side
    90,783.36x = 4,306,651,800.54
  5. Step 5: Solve for x
    x = 4,306,651,800.54/90,783.36
  6. Step 6: Final answer
    x = 47,438.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.